MaxDuo

I remember seeing a while back something about the advantage of the twin turbo being less lag than a single turbo....

So for a while I was thinking that if the turbo ever needed to be replaced, or just upgraded to a better one, a twin turbo would be a nice investment.

But after searching twin turbo and looking at search results (many which just included twin in one place, and turbo in another.... is there away to put it together and look for the string "twin turbo" ? ) I was looking at a thread that said part of what made the FD engine so insane to mess with was that the twin turbo cursed it with the endless number of vacuum tubes... So is that the case with twin turbos? All twin turbos come with a tribe of tubes?


Just curious.


Thanks for the time.

SureShot

The stock 3rd gens can be simplified so both turbos spool up together.
Many owners do just that.
Is comes down to cost, complexity, & driver skill.

Spring is here in Fl.
I already miss those cold morning 11PSI 2nd & 3rd gear pulls.

totallimmortal

i'm not sure about rx7s (i'm not a 3rd gen guy) but i know some cars use two different size turbos one that spools quick and on that doesn't so it has boost all through the rpm range. I'd think that converting to twin turbo would be a bad idea tho seems most of the fast twin turbo cars out there have had a single turbo conversion done and run one big turbo, lots of lag but lots of boost too

MaxDuo

Just wondering because I know I've seen someone on here talking about putting a twin turbo in his 2nd gen before.

MaxDuo

bump?

NZConvertible

Do not confuse the FD's sequential twin-turbo system with a simultaneous twin-turbo set-up (i.e. two turbos simply running in parallel). The problems with the FD's are entirely to do with the complex control system required for sequential operation, not the fact that there were two turbos. The size of the turbos also limits their power potential. The reason FD owners upgrade to a single is because they want more power, and they want a simple way of doing that.

Generally speaking, a parallel twin-turbo set-up can give you less lag for the same power, or more power for the same lag (or something in between). The obvious downsides are cost and packaging.

MaxDuo

Thanks, heh. I just recall someone int he past sayin something about putting in twin turbos I believe, and later on saying something about 2 small ones lowering the lag a lot or something.... Extreme power isn't the biggest thing on my mind, I'd like to be able to produce power quickly. Would like to take a turn, lose the speed needed, and very quickly jump back up, rather than finish the turn, speed up some, then spool up for more power.

SureShot

Turbo lag is not the problem many say it is.
Yes - less is better, but you can adjust your driving style to adapt.

I just got my first turbo, and had to learn all over, how to throttle corners.

MaxDuo

Yeah, I know you could adjust your driving style to it and all, but I'd also rather not have to chance the turbo spooling up in the middle of a turn

I'd like that, when the car does slow down, the turbo will spool back up quickly with as little lag as possible....

I am reminded of seeing an FC in a autox video where a lot of speed was lost in one corner, and the pause for the turbo spooling up was unbearably long (at least to me). After seeing several other cars go through that corner, lose speed, and quickly speed back up, it just kinda hurt to see

NZConvertible

For small stock-size turbos you're right, but you've obviously never been in a car with a big turbo. Unless it's an expensive modern turbo, lag can be measured with a calendar. Nothing much happens below ~4000rpm, and then it hits hard. On the street you get sick of that real quick, because so much of normal driving is done in the 2000-4000rpm range. Generally when selecting a turbo as power potential increases, so does lag due to the turbo's size. If you want big power, you pay for that in lost drivability. Twin-turbo set-ups are a proven way to improve that situation.

$150FC

btw, to search for a string, put it in quotes. "twin turbo" not twin turbo.

MaxDuo

I did that actually. I put it in quotes and got the exact same results that no quotes gave me. I still had threads that had twin and turbo seperate.


NZ, earlier you said the FD set up was different from the simultaneous set up... Do they achieve about the same thing of far less lag though? And they're not as mazy with tubes either are they? Just wondering...